Morphology Data of Oreochromis niloticus
Identification keys
Abnormalities
Main Ref. Seyoum, S. and I. Kornfield, 1992
Appearance refers to
Bones in OsteoBase

Sex attributes

Specialized organs
Different appearance
Different colors
Remarks

Descriptive characteristics of juvenile and adult

Striking features
Body shape lateral fusiform / normal
Cross section compressed
Dorsal head profile
Type of eyes more or less normal
Type of mouth/snout more or less normal
Position of mouth
Type of scales
Diagnosis

Diagnosis: morphologically very close to O. niloticus cancellatus, but caudal fin pigmentation more like that of O. n. niloticus; possession of mtDNA cleavage phenotypes AvaII-E, MboII-C, PvuII-E and RsaI-E (Ref. 27554).

Ease of Identification

Meristic characteristics of Oreochromis niloticus

Lateral Lines Interrupted: No
Scales on lateral line
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line
Scale rows below lateral line
Scales around caudal peduncle
Barbels
Gill clefts (sharks/rays only)
Gill rakers
on lower limb
on upper limb
total
Vertebrae
preanal
total

Fins

Dorsal fin(s)

Attributes no striking attributes
Fins number
Finlets No. Dorsal   
Ventral  
Spines total
Soft-rays total
Adipose fin absent

Caudal fin

Attributes more or less normal

Anal fin(s)

Fins number
Spines total
Soft-rays total

Paired fins

Pectoral Attributes  more or less normal
Spines     
Soft-rays   
Pelvics Attributes  more or less normal
Position    
Spines     
Soft-rays   
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